// the following were defined for ATI firestream 9270, which 
// is actually a pathetic device, as it doesn't support block barriers
//#define SMALL_BLOCK_WIDTH 64
//#define BLOCK_WIDTH 256
// the following can be used for the nVidia Fermi
#define SSVS_SMALL_BLOCK_WIDTH 32
#define SSVS_BLOCK_WIDTH 256

typedef struct {
  float prob;
  int maternal;
  int paternal;
} bestpair_t; //read/write

